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#include<bits/stdc++.h>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin>>n>>m;
    vector<vector<int>>t(n+1, vector<int>(m+1, 0));
    vector<vector<int>>row(n+1, vector<int>(28, 0));
    vector<vector<int>>col(m+1, vector<int>(28, 0));
    int cols=m;
    int rows=n;
    char cur;
    queue<char>q;
    stack<char>s;
    stack<int>ruchy;
    queue<int>qruchy;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        {
            cin>>cur;
            //cout<<(int)(cur)-(int)'A'+1;
            t[i][j]=(int)(cur)-(int)'A'+1;
            row[i][t[i][j]]++;
            if(row[i][t[i][j]]==1)
                row[i][0]++;
            //row[i][0]++;
            col[j][t[i][j]]++;
            if(col[j][t[i][j]]==1)
                col[j][0]++;
            //col[j][0]++;
            if(row[i][t[i][j]]==m)
            {
                q.push('R');
                //q.push((char)(i+(int)'0'));
                qruchy.push(i);
                q.push(cur);
                row[i][27]=1;
                rows--;
            }
            if(col[j][t[i][j]]==n)
            {
                q.push('K');
                //q.push((char)(j+(int)'0'));
                qruchy.push(j);
                q.push(cur);
                col[j][27]=1;
                cols--;
            }
        }
    }
    /*
        for(auto x:t)
        {
            for(auto y:x)
                cout<<y<<" ";
            cout<<endl;
        }
        for(auto x:col)
        {
            for(auto y:x)
                cout<<y<<" ";
            cout<<endl;
        }
        */

    while(!q.empty())
    {
        char g=q.front();
        q.pop();
        int nr=qruchy.front();
        qruchy.pop();
        int kolor=(int)q.front()-(int)'A'+1;
        s.push(q.front());
        q.pop();
        ruchy.push(nr);
        s.push(g);
        /*
        cout<<g<<" "<<kolor<<" "<<nr<<endl;
        for(auto x:col)
        {
            for(auto y:x)
                cout<<y<<" ";
            cout<<endl;
        }
        for(auto x:row)
        {
            for(auto y:x)
                cout<<y<<" ";
            cout<<endl;
        }
*/
        if(cols&&rows)
        {
            if(g=='R')
            {
                for(int i=1; i<=m; i++)
                {
                    col[i][kolor]--;
                    if(!col[i][kolor])
                        col[i][0]--;
                    if(!col[i][27]&&col[i][0]==1)
                    {
                        q.push('K');
                        int licz;
                        for(int j=1; j<27; j++)
                        {
                            if(col[i][j])
                                licz=j;
                        }
                        //q.push((char)((int)i+'0'));
                        qruchy.push(i);
                        q.push((char)(licz+(int)'A'-1));
                        col[i][27]=1;
                        cols--;
                    }
                }
            }
            else
            {
                for(int i=1; i<=n; i++)
                {
                    row[i][kolor]--;
                    if(!row[i][kolor])
                        row[i][0]--;
                    //cout<<i<<" "<<row[i][kolor]<<endl;
                    if(!row[i][27]&&row[i][0]==1)
                    {
                        q.push('R');
                        int licz;
                        for(int j=1; j<27; j++)
                        {
                            if(row[i][j])
                                licz=j;
                        }
                        //q.push((char)((int)i+(int)'0'));
                        qruchy.push(i);
                        q.push((char)(licz+(int)'A'-1));
                        row[i][27]=1;
                        rows--;
                    }
                }
            }
        }
    }

    cout<<s.size()/2<<"\n";
    while(!s.empty())
    {
        cout<<s.top()<<" "<<ruchy.top()<<" ";
        s.pop();
        ruchy.pop();
        cout<<s.top();
        s.pop();
        cout<<"\n";
    }

}